The images below are just previews of what I'm talking about. If you're just here for the printable files, you can find them here. JUST DON'T SELL IT.
It's a lot of files, and they probably require some description.
The board has to be printed on larger paper, and even then you have to print two halves. The paper is 17x22. Cut along the black outer edge, and cut exactly on the white edge. I just Mod Podged it onto a Monopoly board that came in the cheapest set I could find. The two halves should line up with the split in the board. That was the trickiest part of the entire operation. You have to line up the edge and then evenly press on the rest of the board, with particular care in the fold. But, this was one of my first experiences with Mod Podge, so maybe it'll be a lot easier for Mod Podge experts out there.
Finally the box can be printed on two sheets of 17x22, one for the top, one for the bottom.